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View Full Version : SILVIA S15 SPEC R LSD



sime
02-20-2003, 08:28 PM
Whats the ratio on this? Seem to be able to get them from japan pretty cheap and am wondering if it will fit in my 1996 240sx. http://images.andale.com/f2/103/114/8549395/1045360181638_127_2764_IMG.JPG
Thats it right there. If it will fit any mods?
been wondering about this as no one seems to try the s15 parts and what not except conversions.
Thanks in advance

1mns13
02-20-2003, 09:10 PM
Is that the one Japandy is selling? It should work for any R200.

Kookz
02-20-2003, 10:51 PM
3.692

That's about 10% taller than stock, something that you likely WILL feel.

ninety_six
02-20-2003, 11:10 PM
WILL as in good or bad?
what about fitment issues into the housing from a 96 240 with open diff.

d240t2
02-20-2003, 11:21 PM
It'll fit great in an R200...except the output shafts won't mesh right. The output shafts of the S15 diffs are slightly large where they mesh with the diff internals. You'll need output shafts as well.

Dennis

Kookz
02-20-2003, 11:23 PM
10% taller gearing. 10% slower acceleration.

gunluvS14
02-20-2003, 11:47 PM
yup, it will fit into stock open diff. But you would need the output shaft for it.
There was couple of them on sell at ebay that comes with output shaft. 1 of them sold as $300 range. So I think it is a pretty good deal. I was about to get it, but I got out bid and I was in class.. oh well. Maybe next time.

S15 spec R LSD with output flange and bearing (http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33731&item=2400378 866&rd=1)

knightrider
02-21-2003, 01:20 AM
accually, that dif you pictured doesnt have a ring gear, so you wont be going anywhere with that, but if you do get the ring gear with it, yea, 3.92

Hugh
02-21-2003, 01:34 AM
Ditto, there's no gear on that at all.

Did the S15 maintain the same size bolts on the ring gears as the S14/S13? I know the S13 has 12mm bolts, and a skyline has 13mm bolts. Just wondering since they made other changes like the speedometer in the diff housing.

I really don't know anything about all this though... so don't listen to anything I say.

MATT_BACK_VASS
02-21-2003, 04:15 AM
actually youd need the pinion also

Geoffrey
02-21-2003, 04:17 AM
I just got a complete diff with case, ring and pinion, and shafts. I have found at least two people who supposedly run these diffs in the states and I am led to believe that they will drop into my s13 case using my s13 ring and pinion. However, the ring gear bolts ARE 13mm rather than the 12mm on the 240. The 12mm bolts fit loosely in the diff unless some sort of sleeve is used. It might not make a difference for street use but it makes me nervous. You DO need the axle flanges because the splines are different. I have heard nothing yet about the width of the diff flange to flange to know if this would be a problem.

Kookz
02-21-2003, 04:18 AM
Any possibility of using the ring and pinion out of a usdm R200? You could then pretty much pick and choose a ratio.

Hugh
02-21-2003, 04:48 AM
Any possibility of using the ring and pinion out of a usdm R200? You could then pretty much pick and choose a ratio.



Well, I searched all around the internet for R200 info before, and came out with not much except old datsun stuff... and they all were running 3.xx gears, and I wanted a 4.5 or 4.6


Geoffry, what exactly are you trying to say here? You got your hands on a skyline diff or something and you're swapping it over to the S13 diff? Why not just use the whole skyline housing?? Thats what I did with mine. I am running a crazy a$$ diff setup in my car now... A Largo housing, diff, ring and pinion, skyline shafts, skyline input (hog's nose) and a skyline rear cover.

Where are you located, Geoffry?

d240t2
02-21-2003, 11:23 AM
You don't need the pinion. Just the diff internals and output flanges, and a spare open diff case.

Dennis

asad
02-21-2003, 11:24 AM
I believe he meant you need the pinion if you wanted to use the 3.692 rear gear.

Asad

d240t2
02-21-2003, 11:28 AM
Hmm...I think the stock ring gear on the S15 diff will mesh properly with the S14 pinion. Does anyone know offhand if the pinion is actually different?

The diff I have experience with, we were going to use the S15 internals and ring gear with the S14 case and pinion...but we got to the point where the output shafts were different...and haven't gotten output shafts yet. (It is a friend's diff, and he hasn't had the cash to get the proper output shafts yet.)

Dennis

asad
02-21-2003, 12:08 PM
Hmm...I think the stock ring gear on the S15 diff will mesh properly with the S14 pinion.



I doubt it. Even if the S14 pinion gear has the same number of teeth as the S15 pinion (which it doesn't, as you can't get a 3.962 ratio with a 12-tooth pinion), the tooth profile would have to be different to mesh properly with a different number of teeth on the ring gear.

Asad

SykikCHIMP
04-04-2003, 06:13 PM
sorry to bring back an old thread, but got a couple questions:

Does the s14 ring gear also use 13mm bolts? If not is there an easy way to make the s13 ring gear work with the S15 diff? I've never seen the type of sleeves Geofry was referencing.

asad
04-04-2003, 06:23 PM
Does the s14 ring gear also use 13mm bolts?



No, I don't believe so.



I've never seen the type of sleeves Geofry was referencing.



That's because they would have to be custom-made.

Asad

SykikCHIMP
04-04-2003, 07:14 PM
what about any of the other R200 diff ring gears.. i.e 300zx, or J-30? are there any OEM compatible ring gears that will work with the stock s13 or s14 pinion gear?

Kookz
04-04-2003, 07:32 PM
what about any of the other R200 diff ring gears.. i.e 300zx, or J-30? are there any OEM compatible ring gears that will work with the stock s13 or s14 pinion gear?

S13 and S14, same 4.083 ratio, so no beans. J30 is 3.912, and you could swap to that. The 3.69 of the TT is a 230mm gear, and will not work. The Z31 had a few ratios, I don't know them though.

SykikCHIMP
04-04-2003, 07:36 PM
I was thinkin the NA z32 or J30.. but I was really wondering if they had the 13mm bolts or the 12mm?

I'm hoping there is a NON-custom route to use this differential without using the 3.6 s15 gear.

asad
04-04-2003, 09:10 PM
I was thinkin the NA z32 or J30.. but I was really wondering if they had the 13mm bolts or the 12mm?



My guess, based just on when they were made, is that they would have the 12mm ring gear bolts.




I'm hoping there is a NON-custom route to use this differential without using the 3.6 s15 gear.



Dude, a set of bolt sleeves is so easy for a machine shop to make, they'll laugh at you if you call it "custom". Just take them the diff case (the internal part, not the pumpkin) and one of the 12mm ring gear bolts and say "I want this (pointing to bolt) to fit in this (pointing to diff case) without all this (wiggle bolt around in oversized hole)." And they'll say "No problem, sir."

Asad

SykikCHIMP
04-06-2003, 01:41 AM
sweet... Thanks ASAD.. I didn't realize it was that easy. lol

Geoffrey
04-30-2003, 11:41 PM
So has anybody done it yet? I haven't had the time to yank out my s13 diff and compare.
I did find out that at least some 300zs used 13mm bolts or perhaps it was the 350z. I ordered the bolt from the dealer. Unfortunately you can't tell what kind of ring gear is used r200 or r230.

Kookz
05-01-2003, 07:02 AM
The 350Z uses an R200 with a ratio of 3.52 iirc.